Electrical circuit board



FIG. 1 is a perspective view of the electrical circuit board showing my new design;

FIG. 2 is a top plan view of the electrical circuit board showing my new design;

FIG. 3 is a bottom plan view of the electrical circuit board showing my new design;

FIG. 4 is an end view of the electrical circuit board showing my new design;

FIG. 5 is an end view of the electrical circuit board opposite to that shown in FIG. 4, and showing my new design;

FIG. 6 is a side elevation view of the electrical circuit board showing my new design;

FIG. 7 is a side elevation view of the electrical circuit board opposite to that shown in FIG. 6, and showing my new design; and,

FIG. 8 is a bottom perspective view of the electrical circuit board showing my new design.

The broken line in FIGS. 3 and 8 is used for manufacturing purposes only and forms no part of the claimed design. 

The ornamental design for an electrical circuit board, as shown and described. 